JAVA实现Excel模板填充

需要将统计数据填充到指定的Excel模板中

 public void writeExcelFile(LocalDate start, LocalDate end, String filename) {
        File file = new File("files/report_Demo.xlsx");
        XSSFWorkbook workbook = null;
        try {
            FileInputStream fileInputStream = new FileInputStream(file);
            workbook = new XSSFWorkbook(fileInputStream);
        } catch (Exception e) {
        }
        //查找到指定的sheet
        XSSFSheet sheet = workbook.getSheet("抓取数据展示");
        sheet.setForceFormulaRecalculation(true);
        Map<String, List<StatInfo>> sourceCompares = getCompare(start, end);
        Map<String, String> catchMap = new HashMap<>();
        for (Map.Entry<String, List<StatInfo>> entry : sourceCompares.entrySet()) {
            String site = entry.getKey();
            int rowNum = 0;
           //判断指定数据存放到指定的行数
            switch (site) {
                case "weixin":
                    rowNum =